It's two egyptians asylum seekers being illegal black-bagged and handed to a foreign power who turned around and handed them to the country they were fleeing.

It was not just a violation of international law, but a violation of Swedish law which the relevant police officers were not punished for.

So it is an indication that Swedish police can illegally pick people off the streets of Sweden, treat them in a way that is blatantly illegal, illegally hand them off to a foreign power, and not be charged with anything.

Maybe that is not enough to make you more suspicious, but the question is whether or not it gave Assange more reason to be concerned.